Currently, the vast majority of Panasonic VCRs series SD, HD, HS and video players series HR, SR is based on the K-mechanism has proven its reliability and durability in operation with relative ease. Appearance mechanism on the upper side is shown in Fig. 1, bottom - in Fig. 2. In parentheses are the number of parts needed in their order or purchase.

ASSEMBLY MECHANISMIn the process of repair mechanism is often necessary to its partial disassembly for replacement parts that fail. The article describes the assembly sequence that part of the mechanism, which ensures proper phasing of its work, as well as methods of verification mechanism after assembly.The assembly is performed in the following sequence:

1. Fits gear due to a mechanism for loading cassettes and fixed split washer (Fig. 1).2. Fits lever control efforts freezes podkassetnogo receiving node (Fig. 1).3. Set the lever position P5 and gear drive clamp rollers (Fig. 1).4. Installed base lock position P5 and fixed split washer and screw (Fig. 1).5. Fits latch position P5, the bracket with rollers and opener magazine covers.6. Supporting software installed gear so that the hole in it coincided with a hole on the chassis of the mechanism, while the second (small) hole must be matched with a hole in the gear drive pinch roller. Position of gear can fix a pin that is removed after final assembly (Fig. 2). Protrusion on the bracket with a pinch roller to be wound into a groove on the auxiliary program gear.7. Install the stator engine drive shaft and fix it with three screws, keeping the alignment holes. After that, install the rotor motor. On the drive shaft during installation should be dressed in two glands (one above the other - at the bottom).8. Installs the gear, rotating the gear connection with the cassette loading mechanism so that her teeth did not come into engagement with the gear program. Give birth to a ledge regulator lever effort freezes podkassetnogo receiving node in the slot program gears (Fig. 2).9. Set the mode switch by aligning marks on its side and rotating on a fixed frame and fixed with screws.10. Withdrawn holders with stands filling tapes in the bottom position, while ensuring that the correct position lever adjustment of belt tension and fasting P5. Establish a system of levers filling tapes (Foster and supply), by matching tags (small holes) on the gears.11. Installs the bar, the plant in its grooves pins regulator lever belt tension lever and spring tension so that the match marks on the bar and on the gear receiving node filling system tape (Fig. 4). Perpetuate the bar three slotted washer.12. Install the drive gear and mount the engine load.13. Install the plate with the brake and the roller and belt. Secure the plate with two screws. With roller adjust the belt tension.14. Node set to open magazine covers, plant ledge on it in the bracket with a pinch roller.

At the end of the assembly mechanism must ensure the correct phasing as in Fig. 3 and 4.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.4 Phasing sites mechanism, bottom viewAfter this test the mechanism by turning by hand a worm gear on the engine load. Applications should avoid excessive force, since in the case of jamming of the possibility of breakage of some details. At the end of manual checking is fed to the engine load voltage from the three series-connected battery (4,5 V), and perform checking mechanism work. Once the scan return mechanism to its original position.It should be noted that the above details of the phasing mechanism corresponds to the position when the cassette is loaded. To install the assembled cassette translate it into position swapped tapes. Rotate the engine to manually load in the direction of ejection cartridge, install the gear due to the loading mechanism in the position shown in Fig. 5.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة] Fig.5 Phasing loading mechanism in the unloaded state magazineThe position of the label on the movable part of the mode switch must match the one shown in Fig. 6.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.6 The position marks the mode switch in the state unloaded magazineInstall the cassette into the mechanism in accordance with Fig. 5 and attach it with four screws.It should be noted that when performing unloading cassettes without cassette should ensure traction tabs on the gear due to the loading mechanism with a slot in the program gear, turning the hand-gear connection clockwise.When assembling the cassette directly on the chassis of the mechanism of translating it into the position of the loaded cartridge, ensuring alignment marks on the gear lever of the loading and rail loading mechanism, as shown in Fig. 7.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة] Fig.7 phasing mechanism for cassette tape loaded in the stateAfter that, install the side plate cassette to the chassis so that the first prong on the rail loading mechanism coincided with the mark on the gear due to the loading mechanism, as shown in Fig. 8.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.8 phasing gears in status loaded magazineReinforce the side plates with four screws, transfer mechanism in the unloaded position and set the tape cassette holder. Then set the upper metal panel cassette.

EXTRACTION CARTRIDGESIf as a result of a failure, it is impossible to unload the tape, try to remove it the following methods.

1. Take out mechanism (if possible), and manually rotating the worm gear, relocating the fueling tape to the bottom position. Rotate the motor rotor drive shaft counterclockwise podmatyvayut tape. Rotate the worm gear to unload the tape.2. Served on the socket engine load voltage from the three series-connected batteries (plus on pin 2 connector) and relocating the band filling in the bottom position. Rotate the motor rotor drive shaft, podmatyvayut tape. Reconnect the battery is discharged cassette.3. If you remove the tape described method can not perform the following operations:

remove the spring, mounted on a bracket with a pinch roller, and lift the bracket;

withdrawn position P5 and remove the tape from the racks;

rotating motor rotor drive shaft, podmatyvayut tape;

remove one screw from the right lateral plate cassette to remove the rail loading mechanism of the connecting gear;

crack in program bar (in this case usually fails the phasing mechanism.)

8. Shutter does not open when unloading the cassette tape:

broken arm opening blinds (VXL2250);

broken shutter (VKF2709).

9. Cover will not open the cassette upon startup:

broken arm (VML2680), mounted on the cassette holder;

broken opener magazine covers (VDM2101).

It should be noted that the reason of incorrect work may be the mechanism of its contamination or ingestion of foreign objects. In the latter case, may damage the gears, the program bars and levers.

ADJUSTMENT MECHANISMThe need for mechanical adjustments tape mechanism occurs after prolonged use, the replacement of any of its parts, as well as due to unauthorized repairs.

ADJUSTING THE ARM the ribbon

1. Remove the top panel with the cassette and cassette holder.2. Rotate the engine load to bring the mechanism to the position filled by the tape.3. With the holes in the eccentric holder belt controller belt tension adjusting the position of the lever. The left edge of the lever must match the left edge of the clip (see Figure 9)..

1. Enables playback (mounted on top of the tape length 180 minutes) and give the tape to stabilize (approximately 10 ... 20).2. Measure belt tension in the area between the head full erase and fasting P2 (see Fig. 10) with a meter (VFK 0132). Meter reading should be between 22.5 ... 27.5, the3. If the belt tension does not fit into these limits, adjust it, moving the governor spring tension belts on short-or long tooth (in the original position it is on the average).

1. Remove the top panel with the cassette and cassette holder.2. Weaken the fixing screws positions P2 and P3.3. Rotating positions P2 and P3 in a clockwise direction, set them in the lowest position.4. Pivoted to positions P2 and P3 2 turns counterclockwise.5. Set the cassette holder and the top panel cassette.6. Load the tape and start playback. Verify the absence of knee tape in the upper and lower floors of the restrictive positions P1, P2, P3, P4.7. In the case of bending strip remove him adjusting positions P2 and P3.8. Setting compatibility BM (substitutability tapes).

To configure the compatibility of the VM should do the following:

1. Adjustment positions P2 and P3;2. Preliminary adjustment of the block of magnetic heads (BMG) in height;3. Height adjustment BMG;4. Precise control of BMG;5. Adjusting the BMG horizontally. Before you begin, you should disable the auto-tracking. To this end, the microcontroller is converted into service mode jumper between control points:

TP SERV and TP GND for a series of SD;

TP 6010 and TP 6011 series HD.

Voltage at NORM / SERV / TEST MCU in this case is 2,5 ... 4 B. At the end of the jumper settings are removed.In the models later release disable Auto-tracking can be done installing the service mode by pressing two buttons, the FF and EJECT.

ADJUSTMENT POSTS P2 and P3

To adjust the tracking set to the middle position while pressing the TRACKING "+" and "-" button on the remote control (RC) when playing a standard recording (cassette VFJ8125H3F).Oscilloscope control signal to the amplifier output signal from the video heads (RF SIGNAL). To obtain a stable image scan of the oscilloscope can zasinhronizirovat pulse switch the video heads (HEAD SW PULSE).

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.12 The shape of the envelope RF-signal (end of reading)If the envelope of the RF-signal at the input tape in contact with the video heads (when you turn on the video heads) has the form shown in Fig. 11A or 11B, it is necessary to adjust the position P2 to obtain the waveform shown in Fig. 11C. If the envelope of the RF-signal at the output tape from contact with the video heads (when you turn off the video heads) has the form shown in Fig. 12D or 12E, you should adjust the position P3 for the waveform shown in Fig. 12F. Adjusting the tracking in either direction from the central position, you must make sure that the shape of the envelope corresponds to that shown in Fig. 13.V if necessary, further adjust positions P2 and P3.

Rotate the screw A (see Fig. 14) to touch his gear and then turn it to 1.5 turns counter clockwise.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.14 Block stationary headsTurning the screws B and C, set the database D with respect to the base E, as shown in Fig. 14. When adjusting the screws B and C are not allowed to touch the surface with a screwdriver heads.

ADJUSTING THE HEIGHT BMGIn playback mode, rotate the screw A or until the bend ribbon at the bottom of the post of P4, and then turn the screw in the opposite direction until the disappearance of knee tape. Attach the oscilloscope to the output audio channel, and turning the screw C, we achieve maximum signal. The bottom edge of tape should be above the lower edge of the magnetic sinhrogolovki BMG approximately 0.25 mm.

EXACT ADJUSTMENT OF THE HEIGHT BMGIf the position of tape does not match the above, then for BMG lifting screw is rotated a counterclockwise until you bend ribbon at the bottom of the post of P4. Then turn the screw in clockwise until the disappearance of the bend the tape, and screw C until the maximum amplitude of the signal. To lower BMG screws rotate in the same sequence in a clockwise direction.

ALIGN BMG HorizontalSet the tracking to the middle position, while pressing the TRACKING "+" and "-" on the remote while playing a reference recording. Connect the oscilloscope to the amplifier signal video heads (RF SIGNAL). Weaken the screws holding the base E BMG to the chassis and turn the base, we achieve maximum value envelope of the RF-signal.After that anchoring base E screws.

MODE Self-TestIn video recorders (VTR) provides the function of self-diagnostics, which provides, in case of malfunction, the displayed information in the form of a code indicating a fault.The list of codes is given in Table 1.

CodeThe reasonVerification (correction)

U10

The formation of dew

Wait until it disappears

H01

Does not rotate SHIRBRIG

Check the motor control circuit SHIRBRIG

H02

No tape in the cassette podmatyvaetsya during raspravki except mode "Eject"

No transfer of a clock signal between the microcontroller and the chip timer

Check the path passing the clock signal

Table 1: Error codes

SERVICE MODE

Service mode allows you to verify the operation of various units of VM. In this case, the display shows information in the form of facilities and rooms service mode data service, which allows to detect faults and, thus, reduce the repair time.Entry into service mode by simultaneously pressing the "FF" and "Eject" (or turning the handle to position "FF" and click "Eject") on the front panel of the VM. Switching service modes implemented in the same way.The display shows information in the form of four (or five) digits. The first digit (a digit hour display) indicates which of the seven service modes the machine. The second and third digits (digits in minutes) - this service data indicating a position to verify the scheme or mechanism. The fourth (or fourth and fifth - 01, 02, etc.) figure (in the discharge of seconds) - is the number of service data that indicates in any scheme to be a problem.Customer information is not dependent on service conditions and stored in memory after you turn off the VM from the network. Deriving this information to the display is carried out in service mode 2.Consider the appointment of service modes.

Mode 1 Checks the tape protection schemes, ie Work emitting diode and photodetectors beginning and end of the tape by blocking the radiation on the photocell.Mode 2 Checks the circuit switch modes in the transition mechanism from one position to another with an indication of the mechanism in the form of service data.Mode 3 Checks the circuit switch mode after completion of the transition mechanism from one position to another.Mode 4 Checks of the control buttons on the display should appear on the index (in the ranks of service data), corresponding to each of the buttons.Mode 5 Calibrated work of motor control circuit of the drive shaft, ie, transmission of commands from the microcontroller (MC).Mode 6 Inspects the work of the motor control circuit SHIRBRIG.Mode 7 Checks of the engine load. When the button is pressed "Play", the engine load is rotated in the direction of loading. When the button is pressed "Stop", the motor rotates in the direction of discharge. This mode can be indicated by an unlimited time with power. Non-service data in various modes and their meanings are given in Table 2. Non-service information and their values ​​are given in Table 3.

Room service modeNote: to check the package service dataCodes of service dataValueNotes

1

00

Radiation were found at both photodetectors

The tape is not required

01

Blocked by radiation at the photodetector end of the tape (left)

02

Blocked by radiation at the photodetector beginning of the tape (right)

03

Radiation is fed into both the photodetector

2

00

Cassette is unloaded

Requires tape1 Stop-3: The pressure roller is pressed against the drive shaft2 Stop: pinch roller is spaced from the drive shaft.To check the status of the mechanism and timing see Fig. 1

01

The cassette is loaded

02

Rev, Rev Slow

03

Filling, raspravka tape (middle position)

04

Play / Rec, Still / Pause, Cue, Fwd Slow, Stop-31

05

Stop2

06

FF / Rew

07

Intermediate position

3

During the transition mechanism from one position to another service data are not controlled

00

Any indication, other than "00" at the end of the operation means a fault in the circuit switching mode or system

Requires tape

4

Indication of number of service data only when the button is pressed

The tape is not required

5

Controlled only by the left-hand figure

81

Indication 8, 9, U, A, -, n, L, and the lack of indication means that the MC had received information about passing command "Play"

Requires tape. If the display shows other than those indicated in the list, it means the failure of the scheme

Display of 1, 3, 5, 7, 9, A, and nothing is displayed on the passing of the command rotation of the engine SHIRBRIG

Table 2 The value of codes of service dataNotes:1. In some models, the VM no code "U10", "F07" and "F08".2. Code "U10" is displayed only when the power is.3. When the lights code "F" or "H" powered the VM is automatically turned off. When power display fault code disappears.4. Fault code stored in memory and microprocessor timer is stored in it when disconnected from the VM network. If you repeat Mr. include trouble code (in the form of one or two digits in the discharge of seconds) can be displayed by moving the VM to service mode 2. If you have any new fault in the memory is stored only by its code.5. To erase the DTC from the memory to simultaneously push the buttons "FF" and "Eject" for 5 seconds.

CodeServiceInformationFault

0 (00)

All right

1 (01)

Stop cylinder

2 (02)

Stop tape reels

3 (03)

Stop, except for positions 4 or 6

4 (04)

Stop during raspravki tape

5 (05)

Abnormal rotation of the drive shaft

6 (06)

Stop during loading or unloading tapes

7 (07)

Error in the circuit supplying power to the circuit record in writing

8 (08)

Error in the circuit supplying power to the circuit record is not in record mode

9 (09)

Error in the transmission of clock pulses between the microcontroller and timer

Table 3 The value of codes of service information

ELECTRICAL ADJUSTMENTS

Depending on the VM, the list of adjustable parameters can be changed. For electrical adjustment requires the following hardware:

dual-trace oscilloscope with a frequency range up to 35 MHz;

frequency with a frequency range up to 10 MHz, with the ability to measure the period;

digital voltmeter;

Generator video sweep signal (video scan);

generator of sinusoidal signals;

video generator;

Measuring videofonogramma VFV8125H3F (PAL), VFM8080HQFP (NTSC);

net tape VHS;

monitor (TV);

DC power supply.

It should be noted that, depending on the model of the VM, the list of adjustable parameters may vary considerably. Depending on the location of the adjustment elements may vary their item numbers. May also differ and the conditions under which carried out one or another regulation.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig.19 Waveform priregulirovke Identification System SECAMIn view of the foregoing, it is not possible in this article to describe all the possible options for electric adjustments, so we will focus on the most common of them. Electrical adjustment procedures are presented as Table 4.

With what can be compared to assembling G-mechanism? Moreall, with the assembly of three-dimensional puzzle, onlyerror will be noticed immediately, but after switchingVCR. This article will help youPart Number identify the defective part, and afterreplace it quickly and correctly assemble the mechanism.There are three modifications of G-mechanism:proper G, G-REV and GII, have smallstructural differences, but performed by a singlekinematics. Such a mechanismmanned video recorders (VTR) PanasonicSeries G, H, J, L, etc., as well as some other VMsfirms (in particular, Grundig).Due to relatively high consumerqualities, VCR with G-mechanism are inoperation for quite a longtime. In this regard, coming into repair VMoften require the replacement of worn orbroken parts of the kinematics and its subsequentadjustment, which causes somedifficulties due to the complexity of the mechanism.In this paper we consider the kinematicscheme of the mechanism and the assembly sequence of thepart of it, which requires phasing.KINEMATIC PATTERN MECHANISM

On Fig. 1 shows a view from belowG-REV-mechanism.Fig. Figure 2 shows the kinematic schemebottom, and Fig. 3 - upper part of thismechanism. The diagram shows the relationship andphasing of the details of the mechanism for the mode STOP.

Fig. 3. Kinematic diagram of the upperpart of the mechanismFeature of the mechanism is thatloading cassettes and change regimes mechanismcarried out from the engine drive shaft (in the GII-mechanismpart of the operations carried out additionalengine). Rotation from the engine throughcentral sleeve and a leading disc is transferred to thedisc clutch. With this disc rotationtransmitted to the central and relatedseparator and ring gears. Separatorgear transmits rotation to the mainSoft pinion gear and softwarefilling the tape. The main program geara pinch roller drive gearthe moving of the drive mechanismpinch roller and the mode switch, anda lever connection - Software straps.Pinion Software by filling tapesnotched transmits rotation to the gearfilling the tape.Ring gear transmits rotation to theProduct Wizards gear, and byit - on the pinion with rackcassette.ASSEMBLY and phasing MECHANISM

Consider the assembly sequencemechanism in a part that requires the phasing.Incorrect phasing mechanism can leadits jamming and damage to components, soafter assembly mechanism is recommended that you manuallysweep without a greater effort toensure proper functioning.

Install the ring gear, combininga hole in it with a hole chassis asshown in Fig. 4. Then setProduct Wizards gear, combininga hole in it with a hole in the chassis.In this case, a small hole must beopposite the holes in the ring gear. AfterThis set the lock lever.[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig. 4. Install the ring gear

Install the upper side of the chassisgear drive pinch roller. Thenestablish a core program gearso that the small holes on it and onpinch roller drive gear wereon one line. A large hole in the softwaregear should be in this match with a holein the auxiliary program gear, asshown in Fig. 5.>

Installs the gear fuelingtape so that the protrusion auxiliary leverFilling tape was combined with the groove (A) in it, asshown in Fig. 6. Rotate the gear soto a small hole in it was onin line with the axis of the ring gear asshown in Fig. 7. Then setseparator gear with three planetarygear over the ring gear so thatholes in it were in front of the holes in theKey Policy gear filling the tape. InMeanwhile, the hole in the separator gearshould coincide with the opening in the ringgear, as shown in Fig. 8.[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig. 6. Installing the gearFilling tape[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig. 7. Phasing gears[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig. 8. Install separator Gear

Establish a central gear overseparator gear, aligning the holes in itwith a hole in the separator wheel. At the same timesmall hole should be oppositeholes in the disk clutch, as shown in Fig.9. The central gear is fixed to the shaftsplit washer (VMX1079).[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]Fig. 9. Installing central gear

Sometimes repairing tape drivesVCRs, camcorders, copiers andother equipment, "rests" in a broken toothsome gears (Fig. 1, sector 1).Gear, this is either very expensive or hervirtually unobtainable. The author hopesthat the method described below, will be available to manymaster repairmen.

Figure 1For a start, made from paraffinproofing gear. To do this from the paraffin candlesdiameter of 25-40 mm cut cylinder of height 15-20 mm.Then you need a well heated soldering iron with a thinmelt the wax from the end of the cylinder to 1 / 2diameter and 1-2 mm deeper than the thickness of the pinion.Further, in liquid paraffin should put that part of theGear that has all the integer teeth.Addressing a soldering iron melted paraffin tocompletely fill the entire space betweenteeth. For safety you can drop the top 3.4a drop of melted paraffin, thenmust set aside this construction untilcooling and solidification of paraffin.Once frozen paraffin, a scalpel orcutter remove thin layers of its surplus with thetop gear (in Fig. 1, Sector 2 paraffinvisibility is covered with a thin layer of paint). Thenneat, a gentle lurch extractgear from a paraffin cylinder. If somethingdid not work (defects in the prints, brokeexcavation, etc.), the procedure is repeated untilget an even impression of the teeth.Now you must prepare itself gear.To do this, it will be convenient to usemikrodrelyu for drilling circuit boards or smalldrilling machine. Dental burs, alreadyunsuitable for dental treatment, but it issuitable for such operations,You can get it from any dentist. Incidentally, thereYou can also purchase and mikroabrazivnye stones andgrinding wheels. A small dental buropposite the broken tooth in the body gearmilled notch (Fig. 1, Section 3). Depthcavity is 2 / 3 or 3 / 4 the thickness of the gear.Further, a gear must be properlydegrease. You can use thebrush and gasoline "Galoshes" orsolvent grade 646-647. While the gear driesdiluted with epoxy glue in traditionalproportions. His need quite a bit, butshould be very thoroughly mixed compositepart of the glue. Then selects the sharpestimprint of teeth on the paraffin cylinder and a needlefilled with glue. After you do this as soon as possiblerather invest in gear notch upimprint. Then embedded into the groove"Fittings" - a piece of steel needles orthin the broken drill bit. Desirable region"Reinforcement" to be laying in theparaffin imprint obtochit smallabrasive or sandpaper to shape the tooth, sois, give it a wedge shape. After laying"Reinforcement" to the edges of the recess is filled with glue anddrown in it short pieces of thin threads (Fig. 1,Sector 4). Better if it would be Mylar,kamelanovye or silk thread (they havehigh strength). Needs to be monitored,to thread properly impregnated with glue.Resulting from the addition of adhesive thread bumpbest left alone until the setting point.After curing the adhesive gear removed from thewax and needle files to remove the bump sidegears. If turned "litnichki"between the teeth, they can cut bladesafety razor or nail file(Diamond).It remains to add that in this wayrecovered a variety of traction,brackets, hooks and gear the programvehicles with mechanical logic.